<!doctype html>
<html lang="ru">

<head>
    <meta charset="utf-8" />
    <title>Это тестовая страница</title>
    <link rel="stylesheet" href="settings.css" />

    <script src="script.js"></script>
</head>

<body>

    <header>Hello world</header>
    <h1>Head_H1</h1>
    <p>Ozaz_p</p>

    <button>Button</button>

    <script>
        Work();
    </script>

</body>

</html>